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PeCOD® is a patented technology that directly measures photocurrent/charge originating from the oxidization of the organic contamination in a test sample.

The core of the technology is the PeCOD® sensor, which consists of a UV-activated nanoparticale TiO2 (titanium dioxide) photocatalyst coupled to an external circuit. The high electrochemical potential of the TiO2 gives it a substantial advantage over the modest chemical potential generated by the dichromate method.

The sample is introduced into a microcell containing the sensor. The TiO2 is irradiated by UV light, and a potential bias is applied. The UV light creates a photohole in the TiO2 sensor with a very high oxidizing power and organics in the cell are oxidized. PeCOD® is extremely accurate across a broad range of organics. The powerful oxidizing potential of UV-illuminated TiO2 ensures that virtually all species will be fully oxidized giving a true measure of COD.

Why PeCOD®?

  • Fastest available COD analysis method
  • Does not use dichromate and no hazardous waste disposal of reagents
  • Low cost per sample
  • Complete oxidation of organic species ensures accuracy and reproducibility
  • Able to analyse a wide variety of matrices – including high chloride concentrations
  • Unmatched sensitivity for COD (sub-ppm)
  • Small footprint requires minimal bench space (235 x 375 mm)
  • Simple to operate “Click and go” operation
  • Additional software automation options available

  • Online

    PeCOD P100 online COD Analyzer

    The PECOD online system is able to make measurements in real time on a 15 minute cycle time. Ranges available from more than 25mg/l up to 15000 mg/l
    PeCOD analyzers accurately detect COD in samples from a variety of sources and overcome many of the problems encountered by existing COD methods.

  • Real time results (less than 15mins ) to overcome the problems of time delays encountered by chemical oxidation methods
  • Absolute COD measurement avoiding costly and time consuming regular calibration
  • Complete oxidation leading to high accuracy and high reproducibility minimizing matrix variation problems.
  • Direct signal acquisition resulting in high sensitivity and wide linear range
  • Equivalent BOD
  • No Hazardous reagents
  • Small footprint & light weight less than 3.5kg makes it ideal for mounting on-line
  • Splash resistant keypad
  • Identical technologies across platforms (laboratory and on line unit) ensures consistency of results when switching between the two
  • In line mixing avoids user intervention for difficult to analyze samples
  • Unmatched ppb sensitivity (0.2 mg/l) and reproducibility (RSD=±3%)

  • View Brochure


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